Insulating refractory fiber composition and articles for use in casting ferrous metals
AssigneeJohns Manville
InventorWilliam Clyde Miller
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Abstract
An insulating composition useful for riser sleeves, hot tops, ladle liners, and the like articles for use in casting of molten ferrous metal is described. The composition comprises 30% to 50% refractory fiber, 1% to 35% granular silicon carbide, inorganic binder, organic binder, and refractory filler. Molten steel at temperatures on the order of 3,000.degree. F can be readily handled by the articles of this composition. They also afford superior heat insulating properties and in the form of riser sleeves allow molten metal in a riser to remain molten for a longer period before solidification.
Claims13
In a refractory composition suitable for use for containment of molten ferrous metal in casting operations, which comprises, in percentage by weight, 30% to 50% refractory fiber, 5% to 45% inorganic binder, 2% to 10% organic binder, and 5% to 35% refractory filler, and wherein more than half of said refractory fiber component is alumino-silicate fiber, the improvement which comprises further incorporating into said composition 1% to 35% by weight granular silicon carbide.
Dependencies are inferred from the claim text.